In addition to the “power search” methods published by Google itself, here’s a tip posted by LinkedIn contributor, Jakub Zajíček of PitchGround. He calls it the Underground Google Search Hacks.
Find any list (incl. lead lists, event attendees, etc.): Search phrase – site:docs.google.com/spreadsheets/ “insert topic”
Explore Google Docs to find hidden information Search phrase – site:docs.google.com/document “insert topic”
Access hundreds of lead magnets w/o opt-in on any topic: Search phrase – site:*/wp-content/ + filetype:pdf + “insert topic”
Jakub added, to leave these “quotes” there, especially if your topic is 1+ word. If you put it between quotes, it will search only for an exact phrase match.